Analog Circuits-BJT and MOSFET Amplifiers [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 1 - 4 of 97

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Question 1

BJT and MOSFET Amplifiers
Simple Op-Amp Circuits

Appeared in Year: 2007

Question

MCQ▾

In the Op-Amp circuit shown, assume that the diode current follows the equation . For , , and for .

The relationship between and is

The Operational Amplifier with Different Input Voltage

Choices

Choice (4)Response

a.

b.

c.

d.

Passage

Consider for CMOS circuit shown, where the gate voltage of the n-MOSFET is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3V. Assume, that, for both transistors, the magnitude of the threshold voltage is 1 V and the product of trans-conductance parameter is 1mA/

CMOS (Complimentary MOS) Circuit to Find the Output Voltage

Question 2 (1 of 2 Based on Passage)

BJT and MOSFET Amplifiers
Multi-Stage, Differential, Feedback, Power and Operational

Appeared in Year: 2009

Question

MCQ▾

For small increase in beyond 1V, which of the following gives the correct description of the region of operation of each MOSFET

Choices

Choice (4)Response

a.

The MOSFETs are in saturation region

b.

n-MOSFETs is in triode and p-MOSFET is in saturation region

c.

The MOSFETs are in triode region

d.

n-MOSFET is in saturation and p-MOSFET is in triode region

Question 3 (2 of 2 Based on Passage)

BJT and MOSFET Amplifiers
Multi-Stage, Differential, Feedback, Power and Operational

Appeared in Year: 2009

Question

MCQ▾

Estimate the output voltage for [Hints: Use the appropriate current-voltage equation for each MOSFET, based on the answer to Q. 4.16]

Choices

Choice (4)Response

a.

b.

c.

d.

Question 4

BJT and MOSFET Amplifiers
Simple Op-Amp Circuits

Appeared in Year: 2013

Question

MCQ▾

In the circuit shown below what is the output voltage () if a silicon transistor Q and an ideal op-amp are used?

An Inverting Operational Amplifier with Ideal Characteristics

Choices

Choice (4)Response

a.

+ 15 V

b.

+ 0.7 V

c.

-15 V

d.

-0.7 V

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